Vol. 69.] SKELETON OF OBKJTHODESM CS LATWENS. 373 



for, with those belonging to two other individuals, obtained from 

 the Wealden Shales of Atherfield (Isle of Wight), we have sufficient 

 material to restore the almost complete skeleton of this reptile. 

 The blocks of rock containing the latter have all been recovered 

 from the> sea, washed out of an enormous fall of Wealden Shales 

 which occurred near Atherfield Point (Isle of Wight), in the autumn 

 ■of 1904, the same as that which yielded the skeleton of Goniopholis 

 crassidens. 1 



Particulars of the Bones included in the British Museum 

 Specimen, No. R/176. 



Skull: The back of the skull from the centre of the orbits. Eight side 

 ibadly worn, the left and occiput well preserved. 



Vertebras: A cervical, much crushed, the posterior end nearly perfect. 

 Fragments of other vertebra? are to be seen embedded in the matrix adhering 

 to the odd bones. The notarium with the ultimate process of the right side 

 preserved, and the left side enveloped in matrix. Five consecutive dorsal 

 vertebra; follow the notarium on the same mass of shale. Only their ventral 

 surfaces are exposed. Three and the proximal end of the fourth sacral 

 vertebra?. 



Sternum: Nearly perfect. 



Humerus: The right, minus a fragment of the ulnar process near the 

 condyle. A large portion of the left, with the radial process (deltoid crest) 

 well preserved. 



Eadius and ulna: Proximal ends, sections of the shafts, and the distal 

 •extremities of both bones. 



Car pals: Several. 



Metacarpals: Proximal and distal ends of wing-metacarpal. 



Phalanges : Fragments of the wing-phalanges, proximal ends of both right 

 .and left first wing-phalanges. 



There are also shattered and flattened pieces of limb-bones. Where free 

 from a distorted condition, the above are similar in form and measurement to 

 the corresponding bones in the Atherfield fossils. 



Particulars of the Atherfield Specimen, No. 1. 



This specimen was contained in three blocks and a rounded 

 pebble, which had become thus by attrition on the beach since its 

 fall from the cliff. The three blocks combined had a length of 

 540 mm. Two of those blocks fitted together precisely, but the 

 third required a section (which has not been found) to connect it 

 with the other two. As will be proved hereafter, the missing block 

 was originally 89 mm. long. The matrix was a very fine silt, 

 containing both carbonate and phosphate of calcium and iron. Its 

 hardness was extremely variable, and as the bones are of papery 

 thinness and very brittle, their removal without damage was a 

 "matter of much difficulty. These blocks held the following bones : — 



Skull : The greater portion anterior to the orbits. 



Vertebras : An imperfect cervical, the last two cervicals, the almost perfect 

 notarium, and the first four dorsal vertebrae. 



E. W. Hooley, Q. J. G. S. vol. lxiii (1907) pp. 50-63 & pis. ii-iv. 



